Roll suction device



M. WENZEL ROLL SUCTION DEVICE Nov. 10, 1931.

2 Sheets-Sheet l Filed July 7', 1928 Im I w r I I I I I I I I W& \R& I I I I I I I I I I I I llfi R N mu E J Q I Nov. 10, 1931 M. WENZEL ROLL SUCTION DEVICE Filed July '7, 192 ZSheets-Sheet 2 HHI HHU J Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE v ROLL SUCTION DEVIKGE Application filed. m 7, 1928, Serial no. 290,932, and in Germany April 13, 192s.

This invention relates to suction boxes and method tov dispose the supporting rolls which with regard to certain more specific features, to suction boxes such as are used n papermalnng machinery.

carry the conveyor sieve above suction boxes, by means of wh1ch a partial vacuum is made .to functioi pver the surface of the sieve so Among the several objects of theiinvention ayto tend to' draw. water from a layer of 3 may be noted the provision'of suction boxes for paper machinery rolls, in which an independent suction box .is had, for each roll, whereby a greater plurality of steps of sue-'- .10 tion action may be em loyed and a better distribution of suction e ected= over a suction area. Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly-comprises the elementsand combinations of elements, features ofconstruction, and arrangements of parts which will be exemplified in the structure hereinafter described, and the scope of the application of which will be indicated m the following claims. I

In the accompanying'drawings, in which is illustrated one of various possible embodiments of the invention,

Fig. 1 is a longitudinal section through a suction box, certain portions being shown in elevation; r

Fig. 2 is a cross section taken substantially on line 2;.2 of Fig. 1, certain portions being shown in elevation;

g Fig. 3'is atop plan view of a plurality of rolls, certain portions being broken away to show the suction boxes;

Fig. 4 is an enlarged front elevation showing certain structural details;

Fig. 5 is a detailed section taken through a slide and packing plate; Fig. 6 is a plan view of the parts shown in- Fig. 5, a certain sieve or conveyor being removed; and c Fig. 7 is a plan viewofcertain'bottom portions, the same being broken away to show certain packing means.

Si "lar reference'characters indicate corresponding partsthroughout the several views of the drawings. I

The present invention is an improvement on the type of machine set out in my United States Patent 1,518,116 and my German Patent 401,935, the latter issued September 15,

1924. As thisart shows, it comprises a known paper spread out thereon. However, it will be noted that in the rior art devices two or more supporting ro ls are in communica- .Suction area or field is understood to mean that area ofthe sievewhich is located between two supporting rolls and exposed to the partial vacuum. The above statements may be found to be-true by reference to Fig. l-of said United States patent. w I have found that it is desirable that the suction areas in serial arrangement should be operated severally, that is, independently of each other, so that they may either be added severally or be eliminated severally. According to the present invention, this object is to be accom lished by uniting each supportingv roll in ependently with a suction chamber and a packing device so as to form a self-contained suction unit. Owing to this particular new and improved con- 7 struction, one or two or any desired number of suction units, comprisin' a supporting rollwith'pertaining suction x, may be arranged serially as desired in accordance with .the requirements of any given paper marality of units at a time.

I Referring now more 'particularly to' the drawings, it will be noted that the suction boxesf are supported laterally on the side beams g. Each suction on box f carries two bottom members or end pieces e in which bearing brackets c are supported and secured therein by suitable screws (not shown), said bearing brackets containing the bearings d for rotatably sup rtin the su orting rolls 6. The 'purpo e of he end e is to close the space between and around the ends of the rolls 6. As illustrated in Fig. 1 and described in said Patent 1,518,- 116, the slight opening between the rolls and the end pieces 6 are sealed by means of a water dam or seal. The supporting rolls b support the movable sieve a which in turn supports the wet paper. On one of the longitudinal walls a of each suction box f a paqking cleat k composed of several sections is secured. The packing cleat It extends over the entire distance between the end pieces '6, at'both sides. Flexible rubber mats z are mounted on projections w of the upper parts of the packing cleats'h extending oventhe entire length between the slides or gates to. be described,'said mats engaging the sieve a and stripping off the water drawn from the pulp and which water drips through said Slides or gates hareqslidably supported on the end portions 0 so as to 'be movable in the direction of the axes of the supporting rolls. These slides have sealing pads w'engaging adjacent rolls. At the inner edge surfaces of the bottom of each slide or gate k, is secured a flexible lip Z made preferably of rubber and which is directed upward towards the sieve (see Figs. 4 and 5). This lip Z, occupies the space between the sieve a and the rigid margin of the slide or gate, and bein yieldable, this flexible lip will adapt itseli to the sag of the sieve between rolls. The end portions e are slightly. narrower than the suction boxes 7, so that upon serially placing the suction boxes, gaps p will remain (Fig. 7).

This arrangement has the object of facilitat-I ing the serial disposition of the self-contained suction unit. The gap 2. is filled byyielding packin' means. It is of advantage to provide pac 'ng grooves min opposite lateral portions e in such manner that these packmg grooves m are filled in subsequent to the serial placement of the suction'units and for the purpose of filling in thesegrooves, packing cord or a packing mass may be used. The end members e are provided in their lateral walls with perforations 9 between the strips, permitting the passage of. sealing water between the various end members.

Each suction chamber f is arranged to conduct away separately the water on one side by a pipe extension 01. and the air on the other side by the pipe 0. The pipe for withdrawing the airprojects up with the extension 7' in the suction box, above the level of the water, and is protected by the hood r against I the entry of drip 'or splash water. If it is desired, two or more of these suction units may be operated at'uniform partial vac'uum, and the perforations 8 may be disposed in the longitudinal walls for the water, while fected by the slides orgates 7a with packing It is to be'understood that a suitable'seal' is effected between the packing cleats h and the rolls 6 by reason of the Water entrained on the rolls, the distance between the engaging face 4) and the roll being short. Openings w (Fig. 2) permit communication between the rolls so that each suction box efi'ects a vacuum field overonly that part of the sieve suspended between one pair of rolls.

It will be seen from the above that each roll chamber is sealedsalggthe roll at the face a, at the endsof, the roll by tlie dam ends 6', the only remaining sealnecessary, being efthe rubber lips Z.

The purpose of making the gates 7c slidable' is to accommodate various widths of sieves 'a for various widths of paper. It. will be noted that each roll and cooperating suction box comprises a 'self-contained'struc-ture adapted to be abuttedwith the next structure for making up anynumber in a series.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

:As' many. changes could be made in carry ing out the above constructions without departing from the scope of the invention, it is intended that all. matter contained in the above description or shown in the accompanying drawings shall. be interpreted as illustrative and not in a limiting sense.

I claim; v .1. In a roll suction device for paper madinal roll packing cleats, end members for sealilfg the endsof the rolls with slide gates for completing the seal. 1

2. In a roll suction device for papermachines and the like, in combination, a sieve, rotary rolls for supporting said sieve, a plurality of suction c ambers, one associated with each roll and sealing means between each roll and each chamber comprising longitudinal roll packing cleats end members or sealing the ends of the rolls for completing the seaLsaid cooperati'ng between adjacent rolls and aving'fle'xible portions engaging the sieve.

3. In a roll suction device for chines and the like, in combination, a sieve, rotary rolls for supporting said sieve, a plurality of indepen ent suction chambers, one

paper machines and the like, in combination, a sieve,

Ill

with slide gates associated with each roll and means whereby each suction chamber effects a single suction I area over the sieve.

4. In a roll suction device for paper machines and the like, in combination, a sieve,

rotary rolls for supporting said sieve, a plurality of independent suction chambers, one associated with each roll and means whereby each suction chamber effects a single suction .10 area over the sieve, which area is bounded by adiacent rolls.

5. In a roll suction device for paper machines and the like, in combination, a sieve, means for supporting said sieve comprising rolls, a plurality of independent suction boxes formed to support said rol1s','each roll and v suction box therefore comprising a self-contained and independently movable structure, means for effecting a seal between each box and each roll so that independent suction ar'elas may be effected between the successive 'rol s.

'. 6. In a roll suction device for paper machines and the like. in combination, a sieve,

- means for supporting said sieve comprising rolls, a plurality of independent suction boxes formed to support said rolls, each rolland suction box therefor comprising a self-contained and independently movable structure,

means for effecting aeseal between each box and each roll so that independent suction areas may be efiected between the successive rolls, means for communicating between successive suction boxesand means for sealing the communications against leakage.

. In testimony whereof, I have signed my name to this specification this 8th day of June, 1928'; v o MAX WENZEL. 

